Abstract: Black holes are intriguing objects that appear as classical solutions to General
Relativity. When GR is coupled to quantum fields, black holes are even more
mysterious: Hawking showed forty years ago that black holes radiate and have a
temperature and an entropy. In its most direct interpretation, Hawking radiation
also leads to the infamous information paradox. In this seminar, I wish first to
explain those concepts of black hole physics. Then I will introduce my own work on
black hole microstates and how their existence could explain black hole entropy,
resolve the black hole singularity and remove the information problem.